Case Study: PureWave AVC Permits Metals Recycler To Expand Operations
•Case Study: PureWave AVC Permits Metals Recycler To Expand Operations
When a metals recycler in Arizona began planning a facilities expansion featuring a new 6,000-HP car shredder, the local utility expressed concern about the potential for voltage flicker from the very large current surges.
A car shredder is a huge hammer mill, with rotating hammers driven by a large motor. Shredders are used to separate the ferrous material in vehicles, which is then sold to steel mills.
When a vehicle is shredded, the load on the motor fluctuates rapidly. This creates voltage flicker due to rapid fluctuation in current demand.
The current demand changes are predominantly reactive (VAR) and can cause perceptible changes in the intensity of electric lights. Depending on the frequency of occurrence, voltage flicker can be very disturbing and cause some individuals to feel ill. Voltage flicker can also cause equipment malfunctions. Because the voltage flicker with the existing equipment was already severe, the utility insisted that the recycler find a resolution before allowing the facilities expansion.
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